hElLO tRaDeR,
Use ONLY the CNC option when buying shares with an intention of holding it for days or years.
The rest of order types are for day trading.
IOC = IMMEDIATE OR CANCEL
CNC = CASH AND CARRY
REGULAR = REGULAR PRODUCT TYPE
MIS = MARGIN INTRADAY SQUARE OFF
BO = BRACKET ORDER
CO = COVER ORDER
DAY = ORDERS VALID ONLY FOR THE DAY.
GTC = GOOD TILL CANCELED.